The situation and background are complicated and the mainstream media doesn't really have so much time to go into it all - both a lack of reporter time and reader interest. I find it interesting to read takes from people on different sides of it.
One reason the US and UK come across stoppy (eg "Boris to stop the peace negotiations") is Ukraine used to have nukes and in 1994 the US, UK and Russia signed an agreement for them to give them up in return for the parties to guarantee their borders. If you let Russia just send in tanks, kill a few people and then say lets have a new agreement then what's even the point? If they don't stick to the first one they probably won't stick to the second. And then why even bother with nuclear non proliferation? If the agreements aren't worth the paper they are written on you may as well try to get nukes instead.
One reason the US and UK come across stoppy (eg "Boris to stop the peace negotiations") is Ukraine used to have nukes and in 1994 the US, UK and Russia signed an agreement for them to give them up in return for the parties to guarantee their borders. If you let Russia just send in tanks, kill a few people and then say lets have a new agreement then what's even the point? If they don't stick to the first one they probably won't stick to the second. And then why even bother with nuclear non proliferation? If the agreements aren't worth the paper they are written on you may as well try to get nukes instead.